Hi,
gs:Query cannot be used in rendering transformation. As already suggested, chaining transformations
in SLD was not included in the original development and testing, it’s there mostly as an accident, but needs
more development to actually work (see https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer ).
In any case, what you’re trying to do is known as cross layer filtering, which has limited support
in this module:
http://docs.geoserver.org/stable/en/user/extensions/querylayer/index.html
Limited as in, it will work only with small amounts of data, it’s memory bound (for a more general,
not memory bound approach based on spatial joins against spatial databases, we are again looking
for funding or contributions, see the above link).
Cheers
Andrea
···
On Wed, Jan 6, 2016 at 9:20 AM, 冷月残风 <871703246@anonymised.com> wrote:
Hi:
I want to use gs:Query in sld to cropCoverage.
Below sld is not work;
SLD:
<?xml version="1.0" encoding="ISO-8859-1"?>
CropCoverage
Crop Coverage
<ogc:Function name=“parameter”>
ogc:Literalcoverage</ogc:Literal>
</ogc:Function>
<ogc:Function name=“parameter”>
ogc:LiteralcropShape</ogc:Literal>
<ogc:Function name=“gs:CollectGeometries”>
<ogc:Function name=“gs:Query”>
ogc:LiteralBpGeo:city</ogc:Literal>
ogc:Literalgeom</ogc:Literal>
ogc:LiteralINCLUDE</ogc:Literal>
</ogc:Function>
</ogc:Function>
</ogc:Function>
</ogc:Function>
rule1
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